Refractive Status and Prevalence of Refractive Errors in Suburban School-age Children
<p><b>Objective</b>: This study investigated the distribution pattern of refractive status and prevalence of refractive errors in school-age children in Western China to determine the possible environmental factors. <b>Methods</b>: A random sampling strategy in geograph...
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| Format: | Article |
| Language: | English |
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Ivyspring International Publisher
2010-01-01
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| Series: | International Journal of Medical Sciences |
| Online Access: | http://www.medsci.org/v07p0342.htm |
| _version_ | 1818358653036527616 |
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| author | Lian-Hong Pi, Lin Chen, Qin Liu, Ning Ke, Jing Fang, Shu Zhang, Jun Xiao, Wei-Jiang Ye, Yan Xiong, Hui Shi, Zheng-Qin Yin |
| author_facet | Lian-Hong Pi, Lin Chen, Qin Liu, Ning Ke, Jing Fang, Shu Zhang, Jun Xiao, Wei-Jiang Ye, Yan Xiong, Hui Shi, Zheng-Qin Yin |
| author_sort | Lian-Hong Pi, Lin Chen, Qin Liu, Ning Ke, Jing Fang, Shu Zhang, Jun Xiao, Wei-Jiang Ye, Yan Xiong, Hui Shi, Zheng-Qin Yin |
| collection | DOAJ |
| description | <p><b>Objective</b>: This study investigated the distribution pattern of refractive status and prevalence of refractive errors in school-age children in Western China to determine the possible environmental factors. <b>Methods</b>: A random sampling strategy in geographically defined clusters was used to identify children aged 6-15 years in Yongchuan, a socio-economically representative area in Western China. We carried out a door-to-door survey and actual eye examinations, including visual acuity measurements, stereopsis examination, anterior segment and eyeball movements, fundus examinations, and cycloplegic retinoscopy with 1% cyclopentolate. <b>Results</b>: A total of 3469 children living in 2552 households were selected, and 3070 were examined. The distributions of refractive status were positively-skewed for 6-8-year-olds, and negatively-skewed for 9-12 and 13-15-year-olds. The prevalence of hyperopia (≥+2.00 D spherical equivalent [SE]), myopia (≤-0.50 D SE), and astigmatism (≥1.00 diopter of cylinder [DC]) were 3.26%, 13.75%, and 3.75%, respectively. As children's ages increased, the prevalence rate of hyperopia decreased (<i>P</i><0.001) and that of myopia increased significantly (<i>P</i><0.001). Children in academically challenging schools had a higher risk of myopia (<i>P</i><0.001) and astigmatism (≥1.00DC,<i> P </i>=0.04) than those in regular schools. <b>Conclusion</b>: The distribution of refractive status changes gradually from positively-skewed to negatively-skewed distributions as age increases, with 9-year-old being the critical age for the changes. Environmental factors and study intensity influence the occurrence and development of myopia.</p> |
| first_indexed | 2024-12-13T20:32:25Z |
| format | Article |
| id | doaj.art-c03d1cd058ca44a8a251e70da1406c5d |
| institution | Directory Open Access Journal |
| issn | 1449-1907 |
| language | English |
| last_indexed | 2024-12-13T20:32:25Z |
| publishDate | 2010-01-01 |
| publisher | Ivyspring International Publisher |
| record_format | Article |
| series | International Journal of Medical Sciences |
| spelling | doaj.art-c03d1cd058ca44a8a251e70da1406c5d2022-12-21T23:32:23ZengIvyspring International PublisherInternational Journal of Medical Sciences1449-19072010-01-0176342353Refractive Status and Prevalence of Refractive Errors in Suburban School-age ChildrenLian-Hong Pi, Lin Chen, Qin Liu, Ning Ke, Jing Fang, Shu Zhang, Jun Xiao, Wei-Jiang Ye, Yan Xiong, Hui Shi, Zheng-Qin Yin<p><b>Objective</b>: This study investigated the distribution pattern of refractive status and prevalence of refractive errors in school-age children in Western China to determine the possible environmental factors. <b>Methods</b>: A random sampling strategy in geographically defined clusters was used to identify children aged 6-15 years in Yongchuan, a socio-economically representative area in Western China. We carried out a door-to-door survey and actual eye examinations, including visual acuity measurements, stereopsis examination, anterior segment and eyeball movements, fundus examinations, and cycloplegic retinoscopy with 1% cyclopentolate. <b>Results</b>: A total of 3469 children living in 2552 households were selected, and 3070 were examined. The distributions of refractive status were positively-skewed for 6-8-year-olds, and negatively-skewed for 9-12 and 13-15-year-olds. The prevalence of hyperopia (≥+2.00 D spherical equivalent [SE]), myopia (≤-0.50 D SE), and astigmatism (≥1.00 diopter of cylinder [DC]) were 3.26%, 13.75%, and 3.75%, respectively. As children's ages increased, the prevalence rate of hyperopia decreased (<i>P</i><0.001) and that of myopia increased significantly (<i>P</i><0.001). Children in academically challenging schools had a higher risk of myopia (<i>P</i><0.001) and astigmatism (≥1.00DC,<i> P </i>=0.04) than those in regular schools. <b>Conclusion</b>: The distribution of refractive status changes gradually from positively-skewed to negatively-skewed distributions as age increases, with 9-year-old being the critical age for the changes. Environmental factors and study intensity influence the occurrence and development of myopia.</p>http://www.medsci.org/v07p0342.htm |
| spellingShingle | Lian-Hong Pi, Lin Chen, Qin Liu, Ning Ke, Jing Fang, Shu Zhang, Jun Xiao, Wei-Jiang Ye, Yan Xiong, Hui Shi, Zheng-Qin Yin Refractive Status and Prevalence of Refractive Errors in Suburban School-age Children International Journal of Medical Sciences |
| title | Refractive Status and Prevalence of Refractive Errors in Suburban School-age Children |
| title_full | Refractive Status and Prevalence of Refractive Errors in Suburban School-age Children |
| title_fullStr | Refractive Status and Prevalence of Refractive Errors in Suburban School-age Children |
| title_full_unstemmed | Refractive Status and Prevalence of Refractive Errors in Suburban School-age Children |
| title_short | Refractive Status and Prevalence of Refractive Errors in Suburban School-age Children |
| title_sort | refractive status and prevalence of refractive errors in suburban school age children |
| url | http://www.medsci.org/v07p0342.htm |
| work_keys_str_mv | AT lianhongpilinchenqinliuningkejingfangshuzhangjunxiaoweijiangyeyanxionghuishizhengqinyin refractivestatusandprevalenceofrefractiveerrorsinsuburbanschoolagechildren |